feat(generation): restore the SDXL Refiner in Generate and Canvas

docs/src/content/docs/Users Guide/03.Models/Local Models/sdxl.mdx

@@ -181,8 +181,14 @@ image on its own.
 - **Installing** — install **SDXL Refiner** from the starter models, or any refiner checkpoint or
   Diffusers folder; InvokeAI recognizes refiners automatically and lists them under their own
   **SDXL Refiner** family.
-- **Using it** — the refiner is not selectable in the Generate panel or on the Canvas. Use it in the
-  workflow editor.
+- **Using it** — with an SDXL main model selected, the Generate panel shows a **Refiner** section.
+  Pick the refiner there and set **Refiner start** (the point where the base model hands over, 0.8
+  by default), its steps, CFG, scheduler and the positive and negative **aesthetic scores**. The
+  same settings apply to SDXL generations from the Canvas, including inpainting and outpainting; there
+  the base pass cannot start after the hand-over, so the effective denoising strength is capped at
+  1 − Refiner start. The refiner is never offered as a main model, and it cannot be combined with PiD
+  decoding. An image made with a refiner records it in its metadata, so **Recall All** and
+  **Remix Image** restore it. The workflow editor offers the same nodes for custom graphs.
 
 A refiner workflow runs two denoise passes over the same latents:
 

docs/src/content/docs/Users Guide/04.Image Generation/generate-panel.mdx

@@ -51,6 +51,10 @@ A negative prompt lists what you do *not* want in the image, such as *blurry, wa
 
 Not every model uses a negative prompt. SD 1.5, SDXL, SD 3.5 and CogView4 always use it. Several newer models, including Z-Image, Qwen Image and Krea-2, use it only when CFG is above 1, and the box says so. FLUX.1, FLUX.2 and Ideogram 4 do not use a negative prompt, and the box is not shown for them.
 
+### Refiner
+
+The **Refiner** section appears for SDXL models. Pick an **SDXL Refiner** model to have it finish the last part of the denoising schedule; the base model stops at **Refiner start** (0.8 by default, so the refiner handles the final 20%) and the refiner continues from there with its own **Refiner steps**, **Refiner CFG** and **Refiner scheduler**. The **Positive** and **Negative aesthetic score** condition the refiner on the aesthetic rating it was trained with. A **Refiner start** of 1 leaves the refiner nothing to do, so it is not run. The controls are disabled until a refiner is selected, and refiner models are only offered here, never as the main model. The refiner also runs for SDXL generations from the Canvas. It cannot be combined with **PiD Decode**. See [SDXL](/users-guide/models/local-models/sdxl/#sdxl-refiner).
+
 ### Advanced settings
 
 The **Advanced** section appears for models with extra options, and its header counts the settings you have changed. Depending on the model it can include:
@@ -66,7 +70,7 @@ The **Advanced** section appears for models with extra options, and its header c
 
 Each model has recommended settings, which you can change in the Model Manager. **Reset all to model defaults**, the ↺ button in the Generate panel's title bar, applies them: size, steps, CFG or guidance, scheduler and VAE settings. Your prompts are left alone. The button is disabled when your settings already match the defaults.
 
-To return to the settings of an earlier image instead, right-click it in the Gallery or Preview and open **Recall Metadata**. **Recall All** restores its model, concepts, prompts, seed, size and render settings; **Remix Image** does the same but keeps a new seed; and **Use Prompt**, **Use Seed** and **Use Size** recall one thing at a time. Recalled concepts replace the ones in the panel at the weights the image used; any that are not installed or do not fit the model are listed in a notice. If the image's model is not installed, or the image was saved from the canvas, your current concepts are kept.
+To return to the settings of an earlier image instead, right-click it in the Gallery or Preview and open **Recall Metadata**. **Recall All** restores its model, concepts, prompts, seed, size, render and refiner settings; **Remix Image** does the same but keeps a new seed; and **Use Prompt**, **Use Seed** and **Use Size** recall one thing at a time. Recalled concepts replace the ones in the panel at the weights the image used; any that are not installed or do not fit the model are listed in a notice. If the image's model is not installed, or the image was saved from the canvas, your current concepts are kept.
 
 To keep a combination of settings for later, use **Presets** in the panel's title bar to save the current settings under a name and apply them again.
 

invokeai/frontend/webv2/performance/architecture-baseline.json

@@ -2,15 +2,15 @@
   "build": {
     "launchpad": {
       "baseline": {
-        "brotliBytes": 794977,
+        "brotliBytes": 795879,
         "cssRawBytes": 2159,
         "fontRawBytes": 219480,
-        "gzipBytes": 793689,
+        "gzipBytes": 794696,
         "imageRawBytes": 44398,
-        "initialRawBytes": 2042114,
-        "largestAssetRawBytes": 749029,
+        "initialRawBytes": 2046651,
+        "largestAssetRawBytes": 752421,
         "otherAssetRawBytes": 0,
-        "ownedRawBytes": 98621,
+        "ownedRawBytes": 98845,
         "requestCount": 35,
         "scriptRequestCount": 19,
         "sourceOwners": [
@@ -346,15 +346,15 @@
     },
     "editor": {
       "baseline": {
-        "brotliBytes": 1171873,
+        "brotliBytes": 1175838,
         "cssRawBytes": 2159,
         "fontRawBytes": 219480,
-        "gzipBytes": 1165072,
+        "gzipBytes": 1169044,
         "imageRawBytes": 44398,
-        "initialRawBytes": 3208701,
-        "largestAssetRawBytes": 749029,
+        "initialRawBytes": 3222761,
+        "largestAssetRawBytes": 752421,
         "otherAssetRawBytes": 0,
-        "ownedRawBytes": 150716,
+        "ownedRawBytes": 151795,
         "requestCount": 72,
         "scriptRequestCount": 56,
         "sourceOwners": [
@@ -562,6 +562,8 @@
           "source:src/features/generation/core/promptTemplates.ts",
           "source:src/features/generation/core/referenceImage.ts",
           "source:src/features/generation/core/resolveGenerateWidgetValues.ts",
+          "source:src/features/generation/core/sdxlRefiner.ts",
+          "source:src/features/generation/core/sdxlRefinerGraph.ts",
           "source:src/features/generation/core/settings.ts",
           "source:src/features/generation/core/supportedBases.ts",
           "source:src/features/generation/data/architectureCapabilitiesApi.ts",
@@ -1092,7 +1094,7 @@
       "source": "src/app/WorkbenchApp.tsx"
     }
   },
-  "capturedAt": "2026-10-09",
+  "capturedAt": "2026-10-11",
   "developmentInvalidation": {
     "platformUiBarrel": {
       "specifier": "@platform/ui",